<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Document</title>
    <style type="text/css">
      .one {
        background-color: yellowgreen;
        width: 100px;
        height: 100px;
      }
      .two {
        border: 1px solid black;
        background-color: #dddddd;
        width: 100px;
        height: 100px;
        margin: 10px;
      }
      .thr {
        background-color: aqua;
        width: 100px;
        height: 100px;
        padding: 10px;
      }
    </style>
  </head>
  <body>
    <div>
      <div class="one">1</div>
      <div class="two">1</div>
      <div class="thr">2</div>
    </div>
  </body>
</html>
